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WRRCTR No.122 Ecological Observations off the Mokapu, O'ahu, Ocean Outfall: A Post-Installation Study

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Title:WRRCTR No.122 Ecological Observations off the Mokapu, O'ahu, Ocean Outfall: A Post-Installation Study
Authors:Russo, Anthony R.
Dollar, Steven J.
Kay, E. Alison
Keywords:benthic fauna
marine animals
aquatic life
marine plants
show 5 moreHawaii
marine outfall
Mokapu outfall
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LC Subject Headings:Benthos -- Hawaii -- Oahu.
Fish populations -- Hawaii -- Oahu.
Marine animals -- Effect of water pollution on.
Mokapu Peninsula (Hawaii)
Ocean outfalls -- Environmental aspects -- Hawaii -- Oahu.
show 1 moreSewage disposal in the ocean -- Environmental aspects.
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Date Issued:Feb 1979
Publisher:Water Resources Research Center, University of Hawaii at Manoa
Citation:Russo AR, Dollar SJ, Kay EA. 1979. Ecological observations off the Mokapu, O'ahu, ocean outfall: a post-installation study. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC technical report, 122.
Series:WRRC Technical Report
Abstract:An ecological study of the benthic and fish communities at Mokapu, O'ahu, was completed in the summer of 1978 approximately 1 yr subsequent to the installation of a submarine outfall by the City and County of Honolulu. Data were obtained from five transects between Mokapu Point on the northeastern tip of O'ahu to Alala Point, approximately 6 034 m (3.75 miles)
south, at depths of 6 to 24 m (20-80 ft). This study is subsequent to an initial survey completed in 1975 prior to outfall construction.
Results show little or no effect from the operation of the outfall on the benthic and fish communities. There are not significant differences in the abundance, diversity, or composition of fishes from 1975 to 1978 except at the outfall site where new substrate was formed by construction. Between the 1975 and 1978 studies there are some differences in coral species cover indices, which are attributed to patchy substrate distribution rather than
stress from the sewer outfall. Differences in species composition and distribution
of micromolluscan assemblages may also be explained, at least in part, by patchy distribution of the substrate.
Pages/Duration:viii + 49 pages
Appears in Collections: WRRC Technical Reports

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